If you suspect the shoulder, dress it off with a die grinder before you assemble the two pieces. Should be easier than getting into a valve pocket. As in porting & polishing of a race engine. Larry Shannell Sugrue wrote: > Yeah? sounds good, I can get 1 1/4 narrowing to 1", guess I could bush that > one then, I kind of thought a gradual taper would have been better than the > shoulder the bush must make?